Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a49c13650e8cd27…

MALICIOUS

PDF

75.5 KB Created: 2021-02-27 04:59:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 93781f9cf310b7fd0b9328c9a30c1b13 SHA-1: a7324adc52cd7350d732a0ec826a90a8948096b3 SHA-256: 3a49c13650e8cd27fb231690d625a7650935cf4b5b8a4f4116995df11ebfba4a
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://seumenha.ru/wb?keyword=american%20gods%20season%202%20review%20ign PDF link annotation
    • https://nebunabimumebu.weebly.com/uploads/1/3/4/4/134480995/93e48f568.pdfIn PDF document text
    • https://kofoxutekibefa.weebly.com/uploads/1/3/1/4/131454286/339a663f1.pdfIn PDF document text
    • https://cdn.sqhk.co/nezazexador/OJiczhe/57351382227.pdfIn PDF document text
    • http://lightstart.xyz/adventures_in_middle_earth_character_generatorfuumd.pdfIn PDF document text
    • http://braco.ru/durimerogirelwus.pdfIn PDF document text
    • http://nevinidonet.mywebcommunity.org/my_family_and_other_animals_movie_2005.pdfIn PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/9RaIwag/la_redoute_catalogue.pdfIn PDF document text
    • http://robertferrell.net/tawawamopusizidaxidezufu6yst.pdfIn PDF document text
    • https://xifuvago.weebly.com/uploads/1/3/0/8/130813557/7879915.pdfIn PDF document text
    • https://kexezesokofu.weebly.com/uploads/1/3/3/9/133986719/03d1a6b2e3742.pdfIn PDF document text
    • https://pebiname.weebly.com/uploads/1/3/1/4/131453048/baleze_popene.pdfIn PDF document text
    • https://xexidizufom.weebly.com/uploads/1/3/4/5/134508107/7468336.pdfIn PDF document text
    • https://jajesawi.weebly.com/uploads/1/3/0/8/130813829/4466938.pdfIn PDF document text
    • https://cdn.sqhk.co/serodozire/dmgiAPX/28376665505.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/geradi/putiwobuvu.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/dotufaxo.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/diary_of_wimpy_kid_deep_end.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/football_manager_2018_apk_data.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB42 5500 bytes
SHA-256: b8b09e17c72e4be82f2c9e94fba6b1856c8e7c3d1a8d6b6bd0d3683cd0f77217
font_01_sfnt_off0000fdf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF1 10264 bytes
SHA-256: 6e43d1b5dbec68a549712bbcb602a0f4d1a6db14f7d84452959d3ec1dd051b46